New Pair 4.3 GM Chevrolet Cylinder Heads # 113 Casting W/ Head Gasket Set and Bolts

New GM Chevrolet 4.3L #113 Casting Cylinder Heads – Pair (Complete Kit with Gaskets and Bolts)

Brand New OEM-Replacement Kit for Automotive and Marine Applications

This is a brand-new pair of 4.3L GM Chevrolet cylinder heads featuring the #113 casting, engineered for maximum durability and a precise OEM fit. Each head comes fully assembled with valves and springs and is bundled with a complete head gasket set and head bolts for a seamless installation. Designed for versatility, this kit is the ideal solution for restoring performance in Chevrolet trucks, vans, and marine engines.

🛠️ In-House Machining Process

• Debris-Free Preparation: Every new casting is chemically cleaned and blown out to remove all residual machining oils, metal shavings, and manufacturing debris. This ensures your oiling system remains uncontaminated from the first start-up.

• In-House Precision Machining: Unlike “shelf-stock” heads, we perform all final machine work in-house. This includes final guide sizing and precision valve seat cutting to ensure perfect geometry and clearances before the head reaches the assembly bench.

• Pressure & Integrity Testing: To go beyond the factory standard, we pressure-test every head to 60 PSI. This verifies that the casting is free of porosity leaks or internal defects that could compromise the cooling or oiling systems.

• Dimensional Inspection: Our technicians perform a multi-point inspection of the gasket-sealing surface and bore alignment. This ensures the head is perfectly flat and meets tight OEM tolerances for a flawless fit.

• Professional Assembly & Setup: Valvetrain components are installed and verified in a clean-room environment. We check spring heights and seal seating to ensure the assembly is balanced and ready for high-performance use.

• Vacuum-Seal Verification: Every intake and exhaust port is Vacuum Tested. This guarantees a 100% airtight seal between the valves and seats, ensuring maximum compression and peak performance right out of the box.

📊 Technical Specifications

• Engine Size: 4.3L
• Casting Number: 113
• Material: Cast Iron
• Condition: Brand New
• Included Components: Valves, springs, head gasket set, and head bolts
• Core Return Required

🚛 Fitment Data

Common Applications:

• Chevrolet Astro: 2000–2005 Chevrolet Astro (4.3L V6)
• Chevrolet Blazer S10: 2000–2005 Chevrolet Blazer S10 (4.3L V6)
• GMC Jimmy S15: 2000–2005 GMC Jimmy S15 (4.3L V6)
• Oldsmobile Bravada: 2000–2001 Oldsmobile Bravada (4.3L V6)
• GMC Envoy: 2000–2000 GMC Envoy (4.3L V6)
• Chevrolet Express 1500 Van: 2003–2014 Chevrolet Express 1500 Van (4.3L V6)
• Chevrolet Express 2500 Van: 2003–2006 Chevrolet Express 2500 Van (4.3L V6)
• Isuzu Hombre: 2000–2000 Isuzu Hombre (4.3L V6)
• Chevrolet S10: 2000–2004 Chevrolet S10 (4.3L V6)
• GMC S15: 2000–2004 GMC S15 (4.3L V6)
• GMC Sonoma: 2000–2004 GMC Sonoma (4.3L V6)
• GMC Safari: 2000–2005 GMC Safari (4.3L V6)
• GMC Savana 1500 Van: 2003–2014 GMC Savana 1500 Van (4.3L V6)
• GMC Savana 2500 Van: 2003–2006 GMC Savana 2500 Van (4.3L V6)
• GMC Sierra 1500 Pickup: 2000–2006 GMC Sierra 1500 Pickup (4.3L V6)
• GMC Sierra 1500 Pickup: 2007–2007 GMC Sierra 1500 Pickup classic style (creased door skin) (4.3L V6)
• GMC Sierra 1500 Pickup: 2007–2007 GMC Sierra 1500 Pickup new style (smooth door skin) (4.3L V6)
• GMC Sierra 1500 Pickup: 2008–2013 GMC Sierra 1500 Pickup (4.3L V6)
• Chevrolet Silverado 1500 Pickup: 2000–2006 Chevrolet Silverado 1500 Pickup (4.3L V6)
• Chevrolet Silverado 1500 Pickup: 2007–2007 Chevrolet Silverado 1500 Pickup classic style (creased door skin) (4.3L V6)
• Chevrolet Silverado 1500 Pickup: 2007–2007 Chevrolet Silverado 1500 Pickup new style (smooth door skin) (4.3L V6)
• Chevrolet Silverado 1500 Pickup: 2008–2013 Chevrolet Silverado 1500 Pickup (4.3L V6)